diff --git a/pkgs/tools/system/loadwatch/default.nix b/pkgs/tools/system/loadwatch/default.nix
new file mode 100644
index 000000000000..eb7f1e3bb59b
--- /dev/null
+++ b/pkgs/tools/system/loadwatch/default.nix
@@ -0,0 +1,20 @@
+{ stdenv, fetchgit, ... }:
+
+stdenv.mkDerivation {
+  name = "loadwatch-1.1-1-g6d2544c";
+  src = fetchgit {
+    url = "git://woffs.de/git/fd/loadwatch.git";
+    sha256 = "1bhw5ywvhyb6snidsnllfpdi1migy73wg2gchhsfbcpm8aaz9c9b";
+    rev = "6d2544c0caaa8a64bbafc3f851e06b8056c30e6e";
+  };
+  installPhase = ''
+    mkdir -p $out/bin
+    install loadwatch lw-ctl $out/bin
+  '';
+  meta = with stdenv.lib; {
+    description = "Run a program using only idle cycles";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ woffs ];
+    platforms = platforms.linux;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 960bff421dae..1bc8820981e5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1340,6 +1340,8 @@ with pkgs;
 
   languagetool = callPackage ../tools/text/languagetool {  };
 
+  loadwatch = callPackage ../tools/system/loadwatch { };
+
   loccount = callPackage ../development/tools/misc/loccount { };
 
   long-shebang = callPackage ../misc/long-shebang {};